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Re: [Raspberry_Pi_4-Ham_RADIO] Raspberry Pi as WSPR transmitter up to 250Mhz

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Robert Nickels

... Not for an experienced guy like you Eddie, but I m in awe! I m off to make LPF - would appreciate any suggestion as to which band(s) are best -

Message 1 of 25
, Mar 28 6:55 PM

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On 3/28/2013 12:51 PM, psk31 wrote:

> No surprises there,

Not for an experienced guy like you Eddie, but I'm in awe! I'm off
to make LPF - would appreciate any suggestion as to which band(s) are
best - otherwise I'll probably try 20 meters. Will be my first
go-round with WSPR.

Nice work, all!

73, Bob W9RAN

Guido

There is an update of WsprryPi, now supporting some new features that was requested by few: 1. the slower brother of WSPR-2 is supported called WSPR-15. To use

Message 2 of 25
, Apr 1, 2013

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There is an update of WsprryPi, now supporting some new features that was requested by few:

2. it is now possible to specify either a prefix or suffix in the callsign.
Prefix may contain up to three characters before the callsign, e.g: EA8/PE1NNZ or F/PE1NNZ.Suffixes may contain a single alphanumeric character or double digit, e.g: PE1NNZ/p, PE1NNZ/1, PE1NNZ/99

Not for an experienced guy like you Eddie, but I'm in awe! I'm off
to make LPF - would appreciate any suggestion as to which band(s) are
best - otherwise I'll probably try 20 meters. Will be my first
go-round with WSPR.

Hi Guido, Thanks for the last versions of WsprryPi. There are of course always more to wish for. The communication between us has not been perfect. I will

Message 3 of 25
, Apr 5, 2013

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Hi Guido,

Thanks for the last versions of WsprryPi.

There are of course always more to wish for.

The communication between us has not been perfect.

I will try to summarize my comments.

1. Calibration.

I would like to suggest that the calibration should always be done for a particular RasPi board before any txing is performed.

The calibrating could be done in a few steps
by the command wspr LA3JJ JO59 10 10140200 C offset, where offset may be + or - 1, 10 ,100 . This because to use the editor vi and a new compilation is a bit complicated. When a board has been calibrated it has been so for life, so the value should be saved in a file in the home dir and be automatically used the next time when a new version is loaded.

2. Hash coding.

To be able to run txing of longer messages hash coding concept has been used. In my Arduino applications I have still not implemented this, but instead used the program from W3PM to generate the two messages on my W7 PC. When I in advance know the location I have made sets of the relevant dual symbol codes hard coded and select-able from my Arduino LCD screen. The hash coding seemed a bit over my head. At W3PM's pages there are examples of this, but so far I will not go into this for my part. (It would have been nice to have it implemented though as my Arduino is interfaced to a GPS module and calculates the Maidenhead location continuously.)

3. Time sync.

The WsprrPi
uses time sync via the internet. It would have been nice to have sync from a GPS module also to be able to run it really portable.

point a) here is to read and decode GPS time from a GPS module like I have done in my Arduino. Or pint b) to have an input pin (or two) on the RasPi where GPS generated minute time pulses could be received.

4. Multiple band operation.

I made a comment of this: http://wsprnet.org/drupal/node/3994#comment-9882

At the moment I am visiting family at loc JP54 and as my present WsprryPi needs wired internet connection I decided not to bring it along.

I do hope I will be able to make it a fully portable rig in the future.

At the age of 70 now I am learning a little more about C and Python coding every day, but it moves on very slowly.

2. it is now possible to specify either a prefix or suffix in the callsign.
Prefix may contain up to three characters before the callsign, e.g: EA8/PE1NNZ or F/PE1NNZ.Suffixes may contain a single alphanumeric character or double digit, e.g: PE1NNZ/p, PE1NNZ/1, PE1NNZ/99

Not for an experienced guy like you Eddie, but I'm in awe! I'm off
to make LPF - would appreciate any suggestion as to which band(s) are
best - otherwise I'll probably try 20 meters. Will be my first
go-round with WSPR.